Midsegments of Triangles

1
Midsegments of Triangles

• Section 4.4

2
Theorem 4-8

• If a segment joins the midpoints of two sides of
  a triangle, then the segment is parallel to the
  third side and half its length.

a
2a
3
Find X

• 3x 12
• x 4

OR 2(3x) 24 6x 24 x 4
3x
24
4
Find X

• Sides are because and segments are .
  (the red line is a midsegment
• therefore x 55o

x
550
12
6
5
Homework

• P. 203 1-4, 9-14, 18-20